Tikhonov (Russian: Ти́хонов; masculine), sometimes spelled as Tychonoff, or Tikhonova (Ти́хонова; feminine) is a Russian surname that is derived from the male given name Tikhon, the Russian form of the Greek name Τύχων (Latin form: Tycho), and literally means Tikhon's. It may refer to:
- Andrey Nikolayevich Tikhonov, Russian mathematician
 - Alexander Tikhonov, Russian biathlete
 - Alexei Tikhonov, Russian figure skater
 - Andrey Tikhonov, Russian football player and coach
 - Konstantin Tikhonov, Soviet army officer and Hero of the Soviet Union
 - Ivan Tikhonov, Russian-born Azerbaijani gymnast
 - Mikhail Tikhonov, Soviet soldier and Hero of the Soviet Union
 - Nikita Tikhonov, suspect in Stanislav Markelov murder case
 - Nikolai Tikhonov, former Premier of the Soviet Union
 - Nikolai Tikhonov (writer), Russian writer
 - Nikolai Tikhonov (cosmonaut), Russian cosmonaut
 - Vasily Tikhonov (pilot), Soviet pilot and Hero of the Soviet Union
 - Vasily Tikhonov (rower), Soviet rower
 - Vasily Tikhonov (ice hockey), Russian ice hockey coach
 - Vasily Ivanovich Tikhonov, Russian soldier and Hero of the Soviet Union
 - Viktor Tikhonov (politician), Ukrainian politician
 - Viktor Pavlovich Tikhonov, Soviet pilot and Hero of the Soviet Union
 - Viktor Tikhonov (born 1930), Russian ice hockey player and coach
 - Viktor Tikhonov (born 1988), Russian ice hockey player, Viktor Tikhonov's namesake and grandson
 - Vladimir Tikhonov, Russian politician
 - Vladimir Tikhonov (gymnast), Soviet Olympic gymnast
 - Vyacheslav Tikhonov (1928-2009), Soviet actor
 - Anastasia Tikhonova, Russian tennis player
 - Katerina Tikhonova, Russian scientist and manager
 - Nina Tikhonova (1910-1995), Russian choreographic artist and dance instructor
 - Sofia Tikhonova, Russian ski jumper
 - Tamara Tikhonova, former Soviet Russian cross-country skier
 
Mathematics
- Tikhonov distribution, a random variable distribution
 - Tikhonov regularization, a method of regularization of ill-posed problems
 - Tychonoff spaces, a completely regular topological spaces
 - Tychonoff's theorem, a result on topological spaces
 - Tychonoff separation axioms, in topology
 
Other uses
- Tikhonov (rural locality), a khutor in the Republic of Adygea, Russia
 
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